|“||It's-it's nothing. At least, for now. This is the real way to move forward, Mum. To create a whole new world, your own world, without Father.||„|
| — Lucifer to Goddess|
in "The Good, the Bad and the Crispy"
Lucifer used the Flaming Sword to cut through the boundaries of the universe created by Goddess and God, and formed a rift into a formless void, a place of nothingness much like the way our universe was in the beginning. He did so to give his mother a way to move forward, to begin again, to create a world of her very own, forever separated from her husband, as Lucifer saw that this was the only way to save his mother and prevent a war breaking out in Heaven that would kill many angels.
Goddess agreed to Lucifer's plan and entered the void. After she had left, Lucifer removed the key from the Flaming Sword and tossed Azrael's Blade and the Medallion of Life into the void, so that the Flaming Sword could never be reassembled and the two universes would forever remain separate.